Blue-rock trap.



' D. BEST.

BLUE ROCK TRAP.

APPLIGATION FILED JULY 25,1913.

Patented Apr. 14, 1914 2 SHEETS-SHEET 1.

ATTORNEYS D. BEST.

BLUE ROCK TRAP WITNESSES M17. aim/m To all whom it may concern:

rrED STATES.

[DANIEL Best, on SAN LEANDRO, oauuonnm.

BLUE-BOOK TRAP.

Be it known that I, DANIEL Bns'r, a citizen of the United States, and a resident of i l San Leandro, in thecounty of'Alameda and. State of California, have made certain new and useful Improvements in Blue-Rock Traps, of which the following is a specifi- 1 cation. 1

My invention relates .to improvements in traps for throwing blue rocks and 1t consists in the combinations, arrangements and constructions herein described and claimed.

An object of my invention is to provide a device having a frame which may be turned at any angle of the fiel'd, without causing extra strain, or having a tendency to pull the frame out of position.

I pointed out in the appended claims.

My invention is illustrated in the accompanying drawings forming part of this ap plication in which Figure 1- is a side view of. the device, Fig. 2 is a plan view thereof, Fig. 3 is a section along the line 3-3 of Fig. 1, and Fig. 4 is a section along the line 44 of Fig. 1.

In carrying out my invention I make use of a base 1 which may be a floor or, other suitable foundation. Mounted upon the fiooris a base ,plate 2 having a socket 2 arranged to receive a standard 3 which bears the main frame 4. The latter is provided with. a plate 5 which rests upon the base 2 and which is held upon the latter by means of a spring 6 on the standard 3, which bears against a collar 7 at the end of the standard. The frame 4 has an upright 8 which bears a laterally extending arm 9. Atthe,

upper end of the upright 8 is pivotally secured a carrier frame 10 which is designed totilt on a pivot bolt 11. A pulley" 12 is mounted on a pivot 13 carried by the laterally extending arm 9. Pivotally secured to the pivot 13 is an arm 14 which is threaded internally at one end to 'receive' the threaded end of anarm 15 which is pivotally connected at 16to'the carrier frame 10.

The frame 4 is slotted to admit the pulleys 17 and 18 which are mounted on vertical 7 bearing 28 for the crank shaft 29. A further object of my invention is to i axes 17 and 18 respectively. Pivotally mounted at 19 on'the carrier frame 10 is a trigger arm in the shape of a bell crank lever the arm 20 of this lever being perforated, as shown at 20 to provide a passage for a cable 21, and the other arm 22 being arranged to enter an elongated opening 23 in a'trigger shank 23 (see Fig. 4), which is. arranged to slide in a housing25 formed by a portion of the frame 10, a

spring'26 being providedfor normally holding the "trigger in an'upper position. The trigger shank 23 is threaded as shown in Fig. 4 and bears an adjustable nut 23* and Specification of Letters Patent. 1 Patented 14 191% Application filed July 25, 1913. Serial No. 781,130.

a locking nut 23 Secured to the frame 10 is a brace member 27 which has an integral an arm 31 which iipivotally connected by means of the link 32 with a spring 33. The latter is attached to the cable 21 which The latter is provided with a collar 30 having passes through the trigger arm ,20, thence which the rock carrier 39 is secured. Thev latter is in the shape shown in Fig. 2. It is provided-on one edge with a flange 39 U- shaped in section and having a resilient strip 40 arranged to receive the flanged edge of a portion of the rock 41. Springs 42 and 43 are provided for holding the rock in position on the carrier. A spring 44 is se- -cured at one end to an arm 45 carried by the frame 10 andpasses part-1y around and issecured to a grooved wheel 46 which is fastened on the crank shaft '29 From the foregoing description of the various parts of the device, the operation thereof will be readily understood. The rock carrier frame may be swung laterally so as to throw the rock at various angular positions by means of'the handle 47. By adjusting the threaded arm 15 with respect to the arm 14 the carrier frame may be elevated at any desired angle. With the arm in the position shown in Fig. 1, it is only necessary to pull the operating handle 34. thereby stretching the spring 33. When the lug 48 reaches the arm 20 of the trigger it will cause the bell crank lever to pull downwardly on the trigger shank 23 (see Fig. 4),

thereby releasing the arm 38. Under the influence of the spring 33 the arm and the I tion (the lever 34 being released in the mean- It will be observed that when these-nuts time) and it will swing backwardly, being heldby the trigger 24. The trap 'is now ready for throwing another rock whlch may be placed upon the carrier.

1 The force with whi h the rock may be thrown can be regulated by' means of the nuts 23 and 23 on the trigger shank 23.'

are screwed toward the end of the bellcrank lever which projects through the slot 23 the trigger will be operated sooner than it would be if the nuts were screwed in the opposite direction. Now as the spring 33 is constantly increasing its tension the farther it is moved, it will be apparent that greater or less force will be exerted on the throwing arm, dependent upon the moment the trigger is actuated. If the rock is to bethrown against the wind it will require more power than if it is thrown with the Wind or in calm weather and by manipulating the adjusting nuts 23 and 23 the proper tension for throwing the rock may be easily attained.

I claim:

1. In a blue rock trap, a base, a main frame rotatablymounted thereon on a vertical axis, a carrier frame mounted on saidmain frame on a horizontal axis, a crank shaft rotatably carried by said carrier frame at one end thereof, an arm secured to said crank shaft, a rock carrier mounted on said arm,-a trigger carried by said main frame for holding said arm in operative position, a spring for exerting tension on said crank shaft, an operating handle, a cable secured to said operating handle at one end and to said spring at the other, movable means carried by said frame and arranged to engage said trigger for operating the latter, means. carried by said trigger for regulating the time of engagement by said movable means, and means carried by said cable for actuating said movable means.

, 2. In a blue rock trap, a base, a main frame rotatably mountedlthereon on a vertical axis, a carrier frame mounted on said main frame on a horlzontal axls, a crank shaft rotatably carried by said carrier frame at one end thereof, an arm secured to said crank shaft,'a rock carrler mounted on said ried by said cable and arranged to engagethe other end of said bell-crank lever for actuating the latter. 3

3. In a blue rock trap, a base, a main frame rotatably mounted thereon on a vertical axis, a carrier frame mounted on saidmain frame on a horizontal axis, a crank shaft rotatablycarried by said carrier frame atone end thereof,an'arm secured to said crank shaft, a rock carrier mounted on said arm, a trigger carried by said main frame for holding said arm in operative position, said trigger being provided with a threaded portion having an opening therethrough, a spring "for exerting tension on said crank shaft, an operating handle, a cable secured to said operating handle at one end and to said spring at the other, a bell-crank lever pivotally mounted on said main frame, one end of said bell-crank lever being arranged to extend througlnthe openin ger' for operating the latter, a ug carriediby said cable and arranged to engage the other end of said bell-crank lever for actuating the latter, and adjustable nuts carried by said trigger-on the threaded portion thereof for adjusting the time of operation of .the trigger by the bell-crank lever.

DANIEL BEST. Witnesses:

M. D. CHAMBERLIN, I V. H. WILSON.

in said trig- 

